工程科学学报2018，Vol.40Issue(3)：313-320,8.DOI:10.13374/j.issn2095-9389.2018.03.007
应用选择性磁罩盖法磁选分离镍黄铁矿与蛇纹石
Separation of pentlandite from serpentine using the selective magnetic coating-magnetic separation technology
摘要
Abstract
Magnetic coating magnetic separation method was proposed to separate pentlandite from serpentine, which is difficult to separate them using flotation. Results show that under certain physical and chemical conditions of slurry, the pentlandite recovery in-creases with the amounts of magnetite increasing, while the recovery of serpentine remains at a low level, indicating that their separation could be realized. The separation results of the artificial mixtures show that with addition of 5% magnetite, a concentrate of 19. 89% Ni with a recovery of 92. 46% and MgO mass content of 4. 72% are obtained. The results of X-ray diffraction ( XRD) and scanning electron microscopy ( SEM) demonstrate that quantities of magnetite particles adhere to the pentlandite surfaces whereas the surface of serpentine is not clearly coated by the magnetite. The Zeta potential analyses and DLVO calculations suggest that with the addition of sodium hexametaphosphate ( SHMP) , the Zeta potential of serpentine reverses from positive to negative while those of pentlandite and magnetite are not affected significantly. Thus, it made the interaction of magnetite-serpentine become repulsion while that of magnetite-pentlandite remain attraction. Consequently, magnetite particles selectively adhere to the surface of pentlandite and en-hance its magnetism, resulting in the magnetic separation of pentlandite from serpentine.关键词
镍黄铁矿/蛇纹石/磁铁矿/选择性磁罩盖/磁选分离Key words
pentlandite/serpentine/magnetite/selective magnetic coating/magnetic separation分类
矿业与冶金引用本文复制引用
卢冀伟,袁致涛,李丽匣,刘炯天,陆帅帅..应用选择性磁罩盖法磁选分离镍黄铁矿与蛇纹石[J].工程科学学报,2018,40(3):313-320,8.基金项目
国家青年自然科学基金资助项目(51704057) （51704057）
东北大学博士后基金资助项目(20170312) （20170312）
中国博士后基金资助项目(2017M621153) （2017M621153）
